How unlikely is a UUID collision?

Version 4 UUIDs have 122 random bits, making accidental collisions astronomically unlikely even across trillions of generated IDs.

Are these generated securely?

Yes — this uses the browser's built-in crypto.randomUUID(), backed by a cryptographically secure random number generator.

Developer Tools

UUID Generator

Generate one or many random UUID v4 identifiers.

How many UUIDs

UUID v4 list

e3c308f2-533c-4b49-8501-5683c5b1701c
73bb1ded-25b7-4e7b-a865-8ed6b3a05a37
d936d009-45a5-451f-95cb-5c0a13d7079d
a79acbc4-6896-4e54-afd7-35393df51093
683a7b73-0778-4c01-bb6f-b47b58d104e8

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About this tool

Generate cryptographically random Version 4 UUIDs (Universally Unique Identifiers) — commonly used as database keys, API identifiers, and unique tokens in software development.

How to use this tool

1
Set how many you need
Enter a count from 1 to 100.
2
Generate
Click generate to produce that many fresh UUIDs.
3
Copy the list
Use the copy button to grab all of them at once.

Frequently asked questions

How unlikely is a UUID collision?: Version 4 UUIDs have 122 random bits, making accidental collisions astronomically unlikely even across trillions of generated IDs.
Are these generated securely?: Yes — this uses the browser's built-in crypto.randomUUID(), backed by a cryptographically secure random number generator.

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